I wear plastic backed adult diapers 24/7 as my underwear. I do not wear anything over the top of diapers other than pants/jeans/cargo shorts.
To bed I wear a plastic backed disposable adult diaper (Dry 24/7 or Abena M4) and T-shirt.

I always wear my boxer briefs over them if going out in public because it lessons the crinkle. It also helps keep them in place better to prevent sagging as they get wet. However, if I'm home by myself, I don't wear the boxer briefs. It's usually just a shirt and a diaper at that point. Same thing on the rare ocassions I get to wear to bed.

You guys dont feel a little weird when you only wear diapers instead of your normal underwear? In my personal case yes and I love how the diaper feels between my legs
I love that feeling

Wearing diapers is an unusual feeling and that's part of what makes it good. I can wear underpants any old time. Diapers are for fun and I don't want to spoil that with something mundane like regular underpants. I wear a onesie if I need any additional support or noise reduction.

If I wear in public I usually wear underwear over them just to help reduce noise and cover the diaper a little more. If I am at home then I just wear the diaper with nothing other than jeans or shorts.